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Terahertz-driven linear electron acceleration.

Emilio A Nanni1, Wenqian R Huang1, Kyung-Han Hong1

  • 1Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

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|October 7, 2015
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Summary
This summary is machine-generated.

Terahertz-driven accelerators achieve high accelerating gradients, overcoming limitations of conventional radio-frequency and laser-driven systems. This breakthrough enables compact, high-performance electron accelerators for diverse scientific and medical applications.

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Area of Science:

  • Particle Accelerators
  • Plasma Physics
  • Electromagnetic Wave Interactions

Background:

  • Electron accelerator performance is limited by achievable accelerating gradients.
  • Conventional radio-frequency structures offer gradients of 30-50 MeV/m.
  • Laser-driven accelerators show higher gradients but face challenges with source requirements, bunch charge, and timing precision.

Purpose of the Study:

  • To demonstrate linear acceleration of electrons using optically generated terahertz (THz) pulses.
  • To explore THz-driven accelerating structures as a viable alternative for high-gradient acceleration.

Main Methods:

  • Utilized optically generated terahertz pulses for linear electron acceleration.
  • Employed novel terahertz-driven accelerating structures.

Main Results:

  • Achieved linear acceleration of electrons with keV energy gain using THz pulses.
  • Demonstrated high accelerating gradients significantly exceeding conventional methods.
  • Enabled simple accelerating structures with high repetition rates and significant charge per bunch.

Conclusions:

  • Terahertz-driven accelerators offer a pathway to high-gradient acceleration with practical advantages.
  • These ultra-compact accelerators with short electron bunches have transformative potential for FELs, colliders, ultrafast electron diffraction, X-ray science, and medical therapy.